The Spanish word 'cóndor' comes directly from the Quechua word 'kuntur', which meant 'largest flying bird'. This is one of many words that Spanish borrowed from indigenous South American languages after the Spanish conquest of the Americas. The Andean Condor (Vultur gryphus) was and remains a significant cultural symbol in the Andes region, so it's natural that Spanish adopted the local Quechua name for this impressive bird.

Since 'cóndor' comes from Quechua rather than Latin or Greek roots, there aren't many etymologically related Spanish words. However, you might encounter related terms like 'condorismo' (referring to the symbolic use of condor imagery) or 'condorito' (name of a famous Latin American comic character, literally meaning 'little condor').

The English word 'condor' is also borrowed from Spanish 'cóndor', and ultimately from Quechua 'kuntur'. The spelling and pronunciation are very similar in both languages, making this an easy cognate for English speakers to remember. The word is used in English the same way as in Spanish, referring to either the Andean Condor or the California Condor.